Hi, Kristian! About LOCK_log, LOCK_index, LOCK_thread_count and the Bug#62614: 1. In mysql-5.5.13, that we're merging with, LOCK_thread_count is called *after* LOCK_log and LOCK_index. Perhaps it was your merge of log.cc where you swapped them. 2. But in the latest 5.5 as on launchpad, LOCK_thread_count comes before LOCK_log and LOCK_index - they've changed it recently. 3. LOCK_thd_data should go after LOCK_thread_count, because LOCK_thread_count is taken around 'delete thd', and LOCK_thd_data - in the THD destructor. 4. LOCK_log should go after LOCK_thd_data, because LOCK_thd_data is taken around THD::awake(), and THD::awake() locks, mysys_var->current_mutex, which is LOCK_log in MYSQL_BIN_LOG::wait_for_update_relay_log() 5. from 3 and 4 follows that LOCK_thread_count should be locked before LOCK_log, not after. Incidentally, when I did that, almost all safemutex deadlock detector warnings dissapeared (those that I've seen in every rpl test; there are be few in individual tests still). Regards, Sergei